Nozzle attachment for vacuum cleaners



May 22, 1951 w. F. BURRI NOZZLE ATTACHMENT FOR VACUUM CLEANERS Filed June 23, 194s INVENTOR. F. BURRI QM WILLIAM ATTOR N EY Patented May 2x2, 1951 UNITED STATES PATENT OFFICE NOZZLE ATTACHMENT FOR VACUUM CLEANERS 2 Claims. l

This invention relates to nozzles and is particularly Iadapted to be used in connection with vacuum hoses used for cleaning purposes.

The primary object of my invention is to provide a nozzle for vacuum hoses that will provide multiplicity of air channels in connection lwith corrugations or ribs for contacting the surface of fabrics, rugs and upholstery to be cleaned by the vacuum nozzle.

I have found that providing a, multiplicity of air channels creating an upward pull through the weave of the fabric or upholstery, together with a transverse suction action relative to the weave, that a more complete cleaning operation can be performed. The air channels lie longitudinal or parallel to one another, providing a corrugated surface against which the weave of the fabric is drawn as the nozzle is moved across the surface of the fabric.

These air channels cause a rolling or a, Iwave action to be imparted to the weave of the fabric, which loosens the dirt therefrom, together with opening the weave and the permitting of the vacuum to draw the dirt out of the weave.

After the dirt has ibeen drawn through the weave of the fabric a cross current is imparted to the same towards the main suction port of the nozzle. Heretofore when the nozzle was made having a single air chamber contacting the surface of the fabric there was a minimum of .velocity created by the suction, but with my new and improved air channel nozzle high velocities are obtained through these channels which insures a more complete removal of dirt from the fabric or upholstery being cleaned.

Another object of my invention is the designing of a nozzle that is flat and shallow permitting the same to be inserted in places that are ordinarily inaccessible to the average vacuum nozzle.

These and other incidental objects will be apparent in the drawings, specification and claims.

Referring to the drawings:

Figure l illustrates the f'ace of the nozzle which is contacted rvvith the surface to be cleaned illustrating the air channels formed thereon.

Figure 2 is a longitudinal sectional View of the nozzle being applied to the object being cleaned, as for instance a fabric or upholstery.

Figure 3 is a transverse sectional view taken on line 3-3 of Figure 2.

Referring more specifically to the drawings:

My new and improved vacuum nozzle consists of a shell including a flat plate I, which has a rear transverse edge 2 and inwardly curved side edges terminating in a front pointed tip 3. The

nozzle shell and plate are thus of substantially triangular configuration or fiat-iron shape. Forming part of the body portion I is an exhaust pipe 4 by "which the nozzle is connected to the vacuum hose not here illustrated. The exhaust pipe 4 terminates in the flat plate I with a substantially central exhaust opening 5. A depending ange 6 is formed around the outer edge of the flat plate I and has spaced ri-bs I extending inwardly, as best illustrated in Figure 1 towards the center of the nozzle from the points 8 to the points 9. The spaced ribs 7 at the rear wide portion of the shell extend transversely inwardly from the rear side portions of the flange toward the center of the plate in substantially parallel relation to each other and to the rear transverse edge 2 in opposed series and aligned, with their inner ends spaced apart to form a free or unobstructed passage I4 between the rear transverse edge and the opening 5. The other ribs 'I at the front p0rtion of the shell are likewise disposed in double or opposed series spaced apart in substantially parallel relation and extend inwardly and rearwardly from the forwardly converging or curved sides of the flange approximately normal thereto between the opening 5 and the front end of the plate, with their inner ends aligned and spaced apart to form a free or unobstructed passage I3 from the front of the plate to the opening 5 in longitudinal alignment iwith the passage I6 for free flow of the dirt to and through exhaust opening A5 and pipe 4.

The surface of these ribs are slightly raised from the lsurface II of the flange 6 or elevated above the bottom edge of said flange and plane of the nozzle opening defined thereby as -viewed in Figures 2 and 3 in order to seal the entry of air past the said flange. Air channel ways I2 are formed between the ribs and lead to the air |channels I3, I4 and to the opening 5 leading to the exhaust pipe 4, thence to the hose.

I will now describe the action and operation of my new and improved vacuum nozzle. Referring to Figure 2, it will be noted that the fabric or material to be cleaned is raised between the ribs 'I into the air channels at I5. This causes the 'weave to open permitting air to be drawn from the bottom of the fabric up through the weave pulling the dirt therefrom. As the nozzle is moved forward over the surface a wave-like rolling or bending action is imparted to the Weave of the fabric, loosening and exposing the dirt between the threads or yarn and pile or tufts thereof to be removed therefrom.

Referring to Figure 3, it will be noted that air is drawn up through the weave of the fabric into the channels I2, thence across the surface of the fabric in the direction of the arrows into the channel ways I3 and I4 and into the opening 5 to the hose line. Due to the fact that the flange 5 is lower than the ribs l an air seal is provided at I'S forcing th'e air up through the weave of the fabric as indicated, thence `with great velocity transverse the fabric. This is one of the primary objects of my invention, the cross current of air at a high velocity, which has a cleaning effect heretofore not obtained by ordinary nozzles, cleaning the fabric of dust and dirt embedded in the lweave and Ibelow the surface.

I have found that by pulling air through shallow channels that this velocity is increasedv providing a cross scrubbing action to the surface and through the weave of the material being cleaned.

What I claim is:

1. A nozzle for a vacuum cleaner comprising a shell including a flat plate having a depending edge flange Iand an exhaust pipe extending from the top of the fiat plate and communicating iwith an opening formed approximately midway between the front Iand rear edges of said plate, the flat plate having a rear straight transverse edge Iand side edges curved inward from the ends of the rear transverse edge, and terminating in a point at their front ends, a series of aligned spaced apart transverse ribs on the bottom of the at plate between the opening and the rear transverse edge of said plate, said ribs forming part of and extending inwardly from the sides of the depending flange toward the center of the fiat plate, the inner ends of the spaced apart transverse ribs being spaced apart to form a free passage between the rear transverse edge and the opening, a double series of oppositely spaced apart ribs formed with and extending inwardly from and approximately normal to the curved side edges of the flange between the opening and the front end of the plate, the inner ends of one series of said latter ribs being spaced from the inner ends of the other of said series of ribs to form a free passage from the front of the flat plate to the opening therein in alignment iwith the free passage between the rear end of the plate and the opening therein, the flange depending a greater distance below the plate than the ribs.

2. A nozzle for a vacuum cleaner, comprising a shell including a plate having a depending edge flange `and an exhaust pipe extending from the top of the plate and communicating with an opening substantially centrally through the plate, the plate and flange having a rear transverse edge and side edges converging toward the front and terminating in la, point at their front ends, a series of spaced transverse ribs depending from the bottom of the plate forming -air channels therebetween between the opening and rear edge and extending inwardly from the sides of the flange with their inner ends spaced apart `along the longitudinal center of the plate to form an unob structed passage between the rear `edge and opening, a series of oppositely positioned spaced ribs depending from the bottom of the plate forming air channels therebetween extending inwardly and rearwardly from the converging front portions of the side edges of the plate and flange between the opening and front end of the plate with their inner ends spaced apart along the longitudinal center of the plate to form lan unobstructed passage from the front of the plate to the opening in alignment with the first passage, the bottom edges of the ribs being elevated above the bottom edge of the ange and plane of the nozzle opening formed thereby to form an air seal between the bottom edge of the flange and the fabric being cleaned and in conjunction with the ribs and air channels to cause the weave of the fabric to open, and a wave-like rolling or bending `action to ce imparted thereto as the nozzle is moved over the fabric to loosen and remove the dirt by the air drawn from the bottom of the fabric up through the weave thereof.

WILLIAM F. BURRI.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date Re. 13,078 Hammer Jan. 25, 1910 936,222 Dalzell Oct. 5, 1909 1,005,290 Overholt Oct. 10, 1911 1,785,675 Cundiff Deo. 16, 1930 2,164,392 Ellis July 4, 1939 2,210,030 Ellis Aug. 6, 1940 2,243,611 Stroschein May 27, 1941 FOREIGN PATENTS Number Country Date 117,295 Austria Apr. 10, 1930 230,893 Switzerland May 16, 1944 

